Messages in this thread | | | Date | Wed, 14 Nov 2007 11:26:06 -0500 | From | Mark Lord <> | Subject | Re: libata/PATA: GPCMD_SET_STREAMING via SG_IO does nothing |
| |
Sebastian Kemper wrote: > Hi Alan! > > On Tue, Nov 13, 2007 at 09:22:30PM +0000, Alan Cox wrote: >> It isn't a known issue, and it suprises me as SG_IO basically passes >> commands through to the drive. We don't support speed change via xfermode >> setting but GPCMD_SET_STREAMING sohuld behave. >> >> Do you have a simple code example that shows the problem ? > > http://svn.mplayerhq.hu/mplayer/trunk/stream/stream_dvd.c?view=markup ..
That code is riddled with bugs, by the way. It fails to close/clean-up on just about every exit path. But apart from that, it does appear to issue the command.
Another way to the same thing is with "hdparm -E", which contrary to my earlier posting actually does seem to work already with libata.
> See dvd_set_speed(). The drive I'm using is an Optiarc DVD RW AD-7170A. > With the "old" ATA driver dvd_set_speed() works, with libata it doesn't. ..
Can you define "doesn't work" for me? How can I test this to see if it works one way or another ?
The command issue (ioctl) is not returning -1.
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |